package com.atguigu.eduservice.listerner;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.service.EduSubjectService;
import com.atguigu.servicebase.exceptionhandler.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    //因为SubjectExcelListener不能交给spring进行管理，需要自己new，不能注入其他对象
    //不能实现数据库操作

    public EduSubjectService subjectService;

    public SubjectExcelListener() {}

    public SubjectExcelListener(EduSubjectService subjectService){
        this.subjectService = subjectService;
    }

    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {

        if (subjectData == null){
            throw new GuliException(20001, "文件数据为空");
        }
        //一行一行读取，每次读取有两个值，第一个值一级分类，第二个值二级分类
        //判断一级分类是否重复
        System.out.println("subjectData " + subjectData);

        EduSubject existOneSubject =  this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if(existOneSubject == null){

            existOneSubject = new EduSubject();

            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            //一级分类名

            subjectService.save(existOneSubject);

        }

        //获取一级级科目的id
        String pid = existOneSubject.getId();
        //获取不重复的分类
        EduSubject existTwoSubject = existTwoSubject(subjectService, subjectData.getTwoSubjectName(), pid);

        if (existTwoSubject == null){
            existTwoSubject =  new EduSubject();

            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());

            subjectService.save(existTwoSubject);
        }


    }

    //判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService, String name) {
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id", "0");

        EduSubject oneSubject = subjectService.getOne(wrapper);

        return oneSubject;
    }

    //判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService, String name,  String pid) {
        QueryWrapper<EduSubject> wrapper =  new QueryWrapper<>();

        wrapper.eq("title", name);
        wrapper.eq("parent_id", pid);

        EduSubject Subject = subjectService.getOne(wrapper);

        return  Subject;
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
